Based on the data from CO2 emitting facilities in 2018 published by the European Commission, thermal power plants, steel plants, and oil refineries make up the list of major polluters in the State. The names of the owners are also repeated in the list of the most polluting companies in Spain from the Sustainability Observatory, which concludes that Endesa will continue to be the main emitter for a long time as long as it does not carry out a profound transformation of its electricity generation methods.

Among the biggest European polluters, coal-fired power plants stand out above all, which occupy the top ten positions on the continent, except for one notable exception, Ryanair. The company has become the first transport company to appear in this annual top 10.